HWND SetFocus( );
See SetFocus in the Win32 SDK.
Remarks
Sets the input focus to the window.
Example
//The following example attaches an HWND to the CWindow object and
//calls CWindow::SetFocus() to set the input focus
CWindow myWindow;
myWindow.Attach(hWndFoo);
HWND hWndLeftFocus = myWindow.SetFocus();